Quote:
Originally Posted by JulianEdgar
Here's a topic where complete rubbish has (very unfortunately) been disseminated on this forum over many years.
And what's that?
It's that coupe (curved fastback) shapes have low lift - but they don't. Here's a good comparison.
So... typically, these shapes have low drag but high lift! One very important reason that car manufacturers add rear spoilers (etc) to most low drag shapes. |
I believe that any 2-door ( and now 4-door BMWs and AUDIs ) with frameless door glass constitute a 'coupe'. whether fastback, sportback, or notchback.
The image you've chosen for a 'fastback' isn't actually a fastback, as a true fastback has an unbroken roof contour. What's shown would constitute what is currently referred to as a 'Sportback', as Audi and Mercedes-Benz refer to them.
Also, the term 'fastback' could be taken as a true, streamlined contour, as with the 1922 Jaray Cd 0.13 pumpkin seed, or a 'pseudo-Jaray' contour, high-drag contour, as with the original Porsche Cd 0.40, 911/ 912.
Also, also, streamlined fastbacks, as the Nissan LEAF, will not generate as much rear axle lift as Mercedes-Benz CLA 250, or Tesla Model S notchbacks.
Any blanket comment about 'fastbacks' and propensity for rear lift would fail in light of available evidence.